CN103872891A - Industrial frequency transformer impact current suppression circuit, industrial frequency transformer and intrinsically safe power supply - Google Patents
Industrial frequency transformer impact current suppression circuit, industrial frequency transformer and intrinsically safe power supply Download PDFInfo
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- CN103872891A CN103872891A CN201410128283.8A CN201410128283A CN103872891A CN 103872891 A CN103872891 A CN 103872891A CN 201410128283 A CN201410128283 A CN 201410128283A CN 103872891 A CN103872891 A CN 103872891A
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Abstract
The invention provides an industrial frequency transformer impact current suppression circuit. The industrial frequency transformer impact current suppression circuit comprises an energy taking unit arranged on a fire wire of a transformer, a rectification unit electrically connected with the output end of the energy taking unit, a constant voltage unit electrically connected with the rectification unit and a current suppression unit electrically connected with the output end of the constant voltage unit, and the current suppression unit is arranged on the fire wire of the transformer and electrically connected with a fuse F1 of the transformer. Most input voltages can be loaded on a current limiting resistor in the power-on process, all the voltages loaded on the current limiting resistor are loaded at the two input ends of the transformer after the power-on process, therefore, large impact currents cannot be generated by the transformer at the starting-up moment, meanwhile, potential differences are prevented from being generated on the current limiting resistor, the fuse can be effectively prevented from being burnt out by the impacts of the large currents, and the fault rate of the fuse of the industrial frequency transformer is lowered. In addition, high cost caused by transformer power increase through the mode of increasing rated currents of the fuse can be avoided.
Description
Technical field
The present invention relates to converting equipment field, relate in particular to a kind of Industrial Frequency Transformer impulse current and suppress circuit, Industrial Frequency Transformer and intrinsic safety electric source thereof.
Background technology
In intrinsic safety electric source, great majority all adopt Industrial Frequency Transformer as step-down, the main element of isolation, Industrial Frequency Transformer for intrinsic safety electric source need to carry out the test of transformer pattern, input voltage is adjusted to the rated voltage of transformer, by the load that improves secondary winding, input current is adjusted to the load current value that 1.7In(In is supporting fuse), test duration work 6 hours, the winding temperature of transformer is no more than 150 ℃, due to transformer room's perceptual device, in actual use, the fuse of the transformer of testing by form was easily damaged by start transient high-current in starting up's moment, cause fault and affect production and life, and select the fuse that load current value is larger, the power of transformer needs to strengthen, and then make the holistic cost of intrinsic safety electric source high,
In view of this, the device that the transient high-current producing need to propose a kind of can start to transformer time suppresses, prevent that transient high-current from burning out the fuse of transformer, thereby reduce the failure rate of intrinsic safety electric source, and can avoid increasing the power of transformer and bring expensive.
Summary of the invention
In view of this, a kind of Industrial Frequency Transformer impulse current provided by the invention suppresses circuit, the transient high-current producing can start shooting to transformer time suppresses, prevent that transient high-current from burning out the fuse of transformer, thereby reduce the failure rate of intrinsic safety electric source, and can avoid increasing the power of transformer and bring expensive.
Industrial Frequency Transformer impulse current provided by the invention suppresses circuit, comprise be arranged at getting of transformer T1 live wire can unit, with get rectification unit, the constant voltage unit being electrically connected with described rectification unit can unit output be electrically connected and the electric current inhibition unit being electrically connected with described constant voltage unit output, described electric current inhibition unit is arranged at the live wire of transformer T1 and is electrically connected with the fuse F1 of transformer;
Further, between the output of described constant voltage unit and the input of electric current inhibition unit, be also provided with isolated location;
Further, described in, get unit to be current transformer L1;
Further, described rectification unit is bridge heap BD1;
Further, described constant voltage unit comprises the first resistance R 1, triode Q1 and voltage-stabiliser tube ZD1;
The collector electrode of described triode Q1 is electrically connected with the positive output end of bridge heap, the base stage of described triode Q1 is connected with the negative electricity of voltage-stabiliser tube ZD1, the plus earth of voltage-stabiliser tube ZD1, the base stage of described triode Q1 is also electrically connected with the positive output end of bridge heap by the first resistance R 1, and the emitter of described triode Q1 is electrically connected with the input of isolated location;
Further, described electric current suppresses unit and comprises the second resistance R 2, the 7th resistance R 7, controllable silicon Q2 and the 3rd resistance R 3;
One end of described the second resistance R 2 is electrically connected with current transformer, the other end is electrically connected with the fuse F1 of transformer and is formed cascaded structure by the 7th resistance R 7, the anode of described controllable silicon Q2 is electrically connected with the points of common connection of current transformer with the second resistance R 2, and the negative electrode of controllable silicon Q2 is electrically connected with the points of common connection of the 7th resistance R 7 and fuse F1; The control end of described controllable silicon Q2 is electrically connected with the output of isolated location, and the control end of described controllable silicon Q2 is also electrically connected with anode by the 3rd resistance R 3;
Further, described current suppressing circuit also comprises buffer protection branch road, described buffer protection branch road comprises the second capacitor C 2 and the 6th resistance R 6, one end of described the second capacitor C 2 is electrically connected with the points of common connection of the second resistance R 2 summation current transformers, and the other end of the second capacitor C 2 is electrically connected with the points of common connection of the 7th resistance R 7 and fuse F1 by the 6th resistance R 6;
Further, described isolated location is photoelectrical coupler U1.
Correspondingly, a kind of Industrial Frequency Transformer provided by the invention, described Industrial Frequency Transformer is provided with the above-mentioned Industrial Frequency Transformer impulse current of stating and suppresses circuit.
Correspondingly, a kind of intrinsic safety electric source provided by the invention, described intrinsic safety electric source is provided with above-mentioned Industrial Frequency Transformer.
Beneficial effect of the present invention: the present invention can make input voltage major part in the time powering on be carried on current-limiting resistance, after powering on, be carried in the input two ends that voltage on current-limiting resistance is all carried in transformer, thereby avoid transformer can not produce large impulse current at booting moment and avoided producing potential difference simultaneously on current-limiting resistance, can effectively avoid like this impact of large electric current and scaling loss fuse, reduce the failure rate of the fuse of Industrial Frequency Transformer; And the mode that can avoid insuring rated current by increase causes and increases expensive that the power of transformer brings.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described:
Fig. 1 is theory diagram of the present invention.
Fig. 2 is circuit theory diagrams of the present invention.
Embodiment
Fig. 1 is theory diagram of the present invention, Fig. 2 is circuit theory diagrams of the present invention, as shown in the figure, Industrial Frequency Transformer impulse current provided by the invention suppresses circuit, comprise be arranged at getting of transformer T1 live wire can unit, with get rectification unit, the constant voltage unit being electrically connected with described rectification unit can unit output be electrically connected and the electric current inhibition unit being electrically connected with described constant voltage unit output, described electric current inhibition unit is arranged at the live wire of transformer and is electrically connected with the fuse F1 of transformer T1; The present invention can make input voltage major part in the time powering on be carried on current-limiting resistance, after powering on, be carried in the input two ends that voltage on current-limiting resistance is all carried in transformer, thereby avoid transformer can not produce large impulse current at booting moment and avoided producing potential difference simultaneously on current-limiting resistance, can effectively avoid like this impact of large electric current and scaling loss fuse, reduce the failure rate of the fuse of Industrial Frequency Transformer; And the mode that can avoid insuring rated current by increase causes and increases expensive that the power of transformer brings.
In the present embodiment, between the output of described constant voltage unit and the input of electric current inhibition unit, be also provided with isolated location, described isolated location is photoelectrical coupler U1, the input anode (being the positive pole of the light-emitting diode of photoelectrical coupler U1) of described photoelectrical coupler U1 is electrically connected with the emitter of triode Q1, the input cathode (being the negative pole of the light-emitting diode of photoelectrical coupler U1) of photoelectrical coupler U1 is by the 4th resistance R 4 ground connection, between the positive pole of the input of photoelectrical coupler U1 and negative pole, be connected with diode D1, the negative pole of diode D1 is electrically connected with the input anode of photoelectrical coupler U1, the positive pole of diode D1 is electrically connected with the input cathode of photoelectrical coupler U1, the output head anode (being the collector electrode of the phototriode of photoelectrical coupler U1) of described photoelectrical coupler U1 is electrically connected with the control end of controllable silicon ZD1, the negative pole of output end (being the emitter of the phototriode of photoelectrical coupler U1) of photoelectrical coupler U1 is connected with silicon controlled cathodic electricity by the 5th resistance R 5, by the effect of photoelectrical coupler U1, make to isolate between controllable silicon ZD1 and constant voltage unit, avoid occurring disturbing.
In the present embodiment, described in get can unit be current transformer L1; By the effect of current transformer L1, after transformer powers on, starting current is converted into proportional voltage, for effective work of controllable silicon ZD1 provides control voltage.
In the present embodiment, described rectification unit is bridge heap BD1; Pile the effect of BD1 by bridge, the alternating voltage of current transformer L1 output is converted to direct voltage, for silicon controlled work provides galvanic current source.
In the present embodiment, described constant voltage unit comprises the first resistance R 1, triode Q1 and voltage-stabiliser tube ZD1;
The collector electrode of described triode Q1 is electrically connected with the positive output end of bridge heap, the base stage of described triode Q1 is connected with the negative electricity of voltage-stabiliser tube ZD1, the plus earth of voltage-stabiliser tube ZD1, the base stage of described triode Q1 is also electrically connected with the positive output end of bridge heap by the first resistance R 1, and the emitter of described triode Q1 is electrically connected with the input of isolated location; The collector electrode of described triode Q1 is also by the first capacitor C 1 ground connection, the emitter of triode Q1 is also by the 3rd capacitor C 3 ground connection, the emitter of described triode Q1 is also provided with diode D2, the negative pole of diode D2 connects the emitter of triode Q1, the plus earth of diode D2, by the effect of constant voltage unit, for providing galvanic current, controllable silicon work presses, guarantee the work that controllable silicon can be continual and steady.
In the present embodiment, described electric current suppresses unit and comprises the second resistance R 2, the 7th resistance R 7, controllable silicon Q2 and the 3rd resistance R 3;
One end of described the second resistance R 2 is electrically connected with current transformer, the other end is electrically connected with the fuse F1 of transformer and is formed cascaded structure by the 7th resistance R 7, the anode of described controllable silicon Q2 is electrically connected with the points of common connection of current transformer with the second resistance R 2, and the negative electrode of controllable silicon Q2 is electrically connected with the points of common connection of the 7th resistance R 7 and fuse F1, the control end of described controllable silicon Q2 is electrically connected with the output of isolated location, and the control end of described controllable silicon Q2 is also electrically connected with anode by the 3rd resistance R 3, after transformer powers on, first by the metering function of current-limiting resistance (i.e. the second resistance R 2 and the 7th resistance R 7), the transient current that makes to start shooting reduces, then by getting the effect of energy unit (current transformer) and constant voltage unit, obtain galvanic current from live wire and press that to be supplied to controllable silicon ZD1(be thyristor) control end, make controllable silicon ZD1 conducting, when after controllable silicon ZD1 conducting, current-limiting resistance is by short circuit, thereby the voltage that makes live wire and zero line two ends is all loaded into the two ends (being the input two ends of transformer T1) of the primary coil of transformer T1, reach the object of the transient current scaling loss fuse F1 that avoids start.
In the present embodiment, described current suppressing circuit also comprises buffer protection branch road, described buffer protection branch road comprises the second capacitor C 2 and the 6th resistance R 6, one end of described the second capacitor C 2 is electrically connected with the points of common connection of the second resistance R 2 summation current transformers, and the other end of the second capacitor C 2 is electrically connected with the points of common connection of the 7th resistance R 7 and fuse F1 by the 6th resistance R 6; Bronze drum buffer protection branch road, can reduce the voltage at controllable silicon ZD1 two ends in when start, to protect controllable silicon ZD1 not damaged before controllable silicon ZD1 conducting.
Correspondingly, a kind of Industrial Frequency Transformer provided by the invention, described Industrial Frequency Transformer is provided with the above-mentioned Industrial Frequency Transformer impulse current of stating and suppresses circuit.
Correspondingly, a kind of intrinsic safety electric source provided by the invention, described intrinsic safety electric source is provided with above-mentioned Industrial Frequency Transformer
Finally explanation is, above embodiment is only unrestricted in order to technical side's peace of the present invention to be described, although the present invention is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can modify or be equal to replacement technical side's peace of the present invention, and the aim and the scope that do not depart from the technology of the present invention Fang An, it all should be encompassed in the middle of claim scope of the present invention.
Claims (10)
1. an Industrial Frequency Transformer impulse current suppresses circuit, it is characterized in that: comprise be arranged at getting of transformer T1 live wire can unit, with get rectification unit, the constant voltage unit being electrically connected with described rectification unit can unit output be electrically connected and the electric current inhibition unit being electrically connected with described constant voltage unit output, described electric current inhibition unit is arranged at the live wire of transformer T1 and is electrically connected with the fuse F1 of transformer.
2. Industrial Frequency Transformer impulse current suppresses circuit according to claim 1, it is characterized in that: between the output of described constant voltage unit and the input of electric current inhibition unit, be also provided with isolated location.
3. Industrial Frequency Transformer impulse current suppresses circuit according to claim 2, it is characterized in that: described in get can unit be current transformer L1.
4. Industrial Frequency Transformer impulse current suppresses circuit according to claim 3, it is characterized in that: described rectification unit is bridge heap BD1.
5. Industrial Frequency Transformer impulse current suppresses circuit according to claim 4, it is characterized in that: described constant voltage unit comprises the first resistance R 1, triode Q1 and voltage-stabiliser tube ZD1;
The collector electrode of described triode Q1 is electrically connected with the positive output end of bridge heap, the base stage of described triode Q1 is connected with the negative electricity of voltage-stabiliser tube ZD1, the plus earth of voltage-stabiliser tube ZD1, the base stage of described triode Q1 is also electrically connected with the positive output end of bridge heap by the first resistance R 1, and the emitter of described triode Q1 is electrically connected with the input of isolated location.
6. Industrial Frequency Transformer impulse current suppresses circuit according to claim 5, it is characterized in that: described electric current suppresses unit and comprises the second resistance R 2, the 7th resistance R 7, controllable silicon Q2 and the 3rd resistance R 3;
One end of described the second resistance R 2 is electrically connected with current transformer, the other end is electrically connected with the fuse F1 of transformer and is formed cascaded structure by the 7th resistance R 7, the anode of described controllable silicon Q2 is electrically connected with the points of common connection of current transformer with the second resistance R 2, and the negative electrode of controllable silicon Q2 is electrically connected with the points of common connection of the 7th resistance R 7 and fuse F1; The control end of described controllable silicon Q2 is electrically connected with the output of isolated location, and the control end of described controllable silicon Q2 is also electrically connected with anode by the 3rd resistance R 3.
7. Industrial Frequency Transformer impulse current suppresses circuit according to claim 6; it is characterized in that: described current suppressing circuit also comprises buffer protection branch road; described buffer protection branch road comprises the second capacitor C 2 and the 6th resistance R 6; one end of described the second capacitor C 2 is electrically connected with the points of common connection of the second resistance R 2 summation current transformers, and the other end of the second capacitor C 2 is electrically connected with the points of common connection of the 7th resistance R 7 and fuse F1 by the 6th resistance R 6.
8. Industrial Frequency Transformer impulse current suppresses circuit according to claim 7, it is characterized in that: described isolated location is photoelectrical coupler U1.
9. an Industrial Frequency Transformer, is characterized in that: the Industrial Frequency Transformer impulse current that described Industrial Frequency Transformer is provided with described in the arbitrary claim of claim 1-8 suppresses circuit.
10. an intrinsic safety electric source, is characterized in that: described intrinsic safety electric source is provided with Industrial Frequency Transformer claimed in claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410128283.8A CN103872891B (en) | 2013-12-13 | 2014-04-01 | Industrial Frequency Transformer dash current suppresses circuit, Industrial Frequency Transformer and intrinsic safety electric source thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310693642.X | 2013-12-13 | ||
| CN201310693642 | 2013-12-13 | ||
| CN201310693642X | 2013-12-13 | ||
| CN201410128283.8A CN103872891B (en) | 2013-12-13 | 2014-04-01 | Industrial Frequency Transformer dash current suppresses circuit, Industrial Frequency Transformer and intrinsic safety electric source thereof |
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| Publication Number | Publication Date |
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| CN103872891A true CN103872891A (en) | 2014-06-18 |
| CN103872891B CN103872891B (en) | 2016-05-04 |
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| CN201410128283.8A Active CN103872891B (en) | 2013-12-13 | 2014-04-01 | Industrial Frequency Transformer dash current suppresses circuit, Industrial Frequency Transformer and intrinsic safety electric source thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114552965A (en) * | 2022-04-25 | 2022-05-27 | 深圳市暗能量电源有限公司 | Surge current suppression circuit, switching power supply and chip |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2041084U (en) * | 1988-09-08 | 1989-07-12 | 黄立新 | Electricity-saving device |
| CN101232236A (en) * | 2008-02-20 | 2008-07-30 | 河北工业大学 | Soft starter device triggering circuit power supply source |
| CN101651439A (en) * | 2009-05-05 | 2010-02-17 | 哈尔滨帕特尔科技有限公司 | Switch autotransformer type intermediate and high voltage motor soft start device |
| CN201904614U (en) * | 2010-12-28 | 2011-07-20 | 北京新雷能科技股份有限公司 | Current surge inhibition circuit for PFC circuit |
| CN203747638U (en) * | 2013-12-13 | 2014-07-30 | 中煤科工集团重庆研究院有限公司 | Power frequency transformer's impulse current inhibiting circuit, power frequency transformer and its intrinsically safe power supply |
-
2014
- 2014-04-01 CN CN201410128283.8A patent/CN103872891B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2041084U (en) * | 1988-09-08 | 1989-07-12 | 黄立新 | Electricity-saving device |
| CN101232236A (en) * | 2008-02-20 | 2008-07-30 | 河北工业大学 | Soft starter device triggering circuit power supply source |
| CN101651439A (en) * | 2009-05-05 | 2010-02-17 | 哈尔滨帕特尔科技有限公司 | Switch autotransformer type intermediate and high voltage motor soft start device |
| CN201904614U (en) * | 2010-12-28 | 2011-07-20 | 北京新雷能科技股份有限公司 | Current surge inhibition circuit for PFC circuit |
| CN203747638U (en) * | 2013-12-13 | 2014-07-30 | 中煤科工集团重庆研究院有限公司 | Power frequency transformer's impulse current inhibiting circuit, power frequency transformer and its intrinsically safe power supply |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114552965A (en) * | 2022-04-25 | 2022-05-27 | 深圳市暗能量电源有限公司 | Surge current suppression circuit, switching power supply and chip |
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